【摘要】 利用1999～2009年汾渭断裂带GPS速度场观测资料,研究了跨断裂剖面变形动态演化特性、应变积累的分段差异性以及汶川大地震等的可能影响。结果表明:近10年来山西断陷带南段、渭河盆地中东部应变积累相对较快,山西断陷带北端的蔚广盆地南缘断裂、渭河断裂西段也存在一定程度应变积累。汶川大地震影响相对明显,2007～2009年应变积累明显增强的有渭河断裂西段、山西断陷带南段和蔚广盆地南缘断裂。更多还原

【Abstract】 Using velocity-field data observed by GPS from 1999 to 2009 in the Fen-Wei Fracture Belt,we study the features of the dynamic evolution of the cross-fracture section deformation,the difference of strain accumulation between fracture segments,and the possible influence of the MS8.0 Wenchuan Earthquake on the Belt.The result shows that in recent 10 years,the southern segment of the Shanxi Fracture and the middle-eastern Weihe Basin displayed relatively faster strain-accumulation,the southern margin fault of the Weiguang Basin and the western segment of the Weihe fracture also existed strain accumulation to some extent.All these variation obviously resulted from the Wenchuan Earthquake.From 2007 to 2009,the strain accumulation increased in the western segment of the Weihe Fracture,the southern segment of the Shanxi Fracture and the southern fault in the margin of the Weiguang Basin.更多还原